<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
            <meta content="width=device-width,initial-scale=1,user-scalable=no" name="viewport">
                <style type="text/css">
                    *{margin:0;}body,html{overflow:hidden;width:100%;height:100%;}body{background-color:#fff;}div{height:100%;text-align:center;}img{position:relative;top:50%;margin-top:-140pt;}
                </style>
            </meta>
        </meta>
    </head>
    <body>
        <div>
            <img src="assets/picture/Loading.gif"/>
        </div>
    </body>
</html>